Optical Response of Silver Nanoparticles Stabilized by Amines to LSPR based Sensors

Roldán, María Virginia; Pellegri, N.; Sanctis, O.A. de

doi:10.1016/j.mspro.2012.06.080

Cited by 21 publications

(11 citation statements)

References 6 publications

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“…The intense band at 420 nm is attributed to the formation of metallic Ag Nps . The attribution of the 470 nm band can be tentatively assigned to an Ag–Au alloy, known to give raise to one absorption band, located between 450 and 550 nm, depending on the alloy composition .…”

Section: Resultsmentioning

confidence: 91%

Growth of Gold Nanoparticles in a Glass Matrix by Continuous Laser Irradiation for Efficient Surface Enhanced Raman Scattering

Faraj

Goutaland

Ollier

et al. 2019

Physica Status Solidi (a)

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The synthesis of a soda‐lime glass doped by gold nanoparticles (Nps) is achieved using successively thermal poling and continuous wave (cw) ultraviolet (UV) laser exposure. The formation of gold Nps is undoubtedly proved by an absorption band characteristic of their surface plasmon resonance (SPR), and by scanning electron microscopy, which reveals Nps of about 40 nm in diameter, located in the very near surface region of the glass. Absorption spectroscopy also suggests the formation of bimetallic silver‐gold Nps in systems prepared by using thermal poling and laser exposure of a glass previously doped by silver ions using ion exchange. Finally, the low detection limit of Rhodamine 6G (R6G) measured by surface‐enhanced Raman spectroscopy proves the potential of our gold‐doped glass as an efficient Raman substrate, which offers an alternative to silver Nps doped glass.

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Section: Resultsmentioning

confidence: 91%

Growth of Gold Nanoparticles in a Glass Matrix by Continuous Laser Irradiation for Efficient Surface Enhanced Raman Scattering

Faraj

Goutaland

Ollier

et al. 2019

Physica Status Solidi (a)

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“…It is well known that the optical absorption spectra of metal nanoparticles are dominated by surface-plasmon resonance (SPR), with the shift to longer wavelengths with increasing particle size [5]. Noble metals such as silver nanoparticles (NPs) have received immense attention due to their excellent electrical, optical, physical, chemical and magnetic properties [6][7][8]. The localized surface plasmon resonance (LSPR) is another characteristic of silver nanoparticles that is the effect of the collective oscillation of the excited conduction electrons by the incident electromagnetic radiation.…”

Section: Abbas and Abbasmentioning

confidence: 99%

“…At the same time, the oscillation of the electrons produces a polarization in the opposite sense in the surrounding medium of the generated particle. This polarization abates the strength of the restoring force over the nanoparticle, leading to a shift in LSPR depending of the surroundings characteristic [7]. Noble metal nanoparticles have been very attractive for biochemical, biophysical and biotechnological applications due to their extraordinary physical properties, particularly due to their sharp plasmon absorption peak in the visible region.…”

Section: Abbas and Abbasmentioning

confidence: 99%

Influence of Magnetic Field on Silver Nanoparticles Synthesized by Laser Ablation

Abbas

Adnan

2020

eijs

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Laser ablation of a silver target immersed in distilled water using Nd:YAG laser with a fundamental wavelength of 1064nm was carried out to fabricate silver nanoparticles (Ag NPs) with different laser energy in the presence and absence of magnetic field. UV-Visible spectrum showed that the nanoparticles are almost spherical in shape. The number of Ag NPs increased by increasing laser energy while their particle size was reduced by increasing laser energy without magnetic field. In the presence of magnetic field, the size of Ag NPs increased slightly by increasing laser energy. According to AFM results, the presence of magnetic field did not affect the average diameter of Ag NPs. The presence of a magnetic field causes a change in grain size of Ag NPs with increasing laser energy. While XRD data illustrated that the magnetic field causes an increase in the crystallite size of Ag NPs.

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“…The potential exhibited by silver nanoparticles has increased the interest of the market in consuming this nanomaterial in a variety of specific and advanced applications, such as catalytic, optical, biological, surface‐enhanced Raman spectroscopy (SERS), electrical/electronic, energy field, medicine, antimicrobial textiles, antimicrobial polymers, and water treatment . Since the unique chemical and physical properties exhibited by silver nanoparticles are morphology‐dependent, the synthesis of tailored nanoparticles became a challenge and the focus of researchers and engineers.…”

Section: Introductionmentioning

confidence: 99%

“…The most common stabilizing agents include polymers, polyelectrolytes, surfactants, salts, and organic molecules (such as amino‐terminated and also thiol‐terminated). Depending on the type and concentration of each of these chemical compounds, the chosen chemical reduction method (aqueous phase, organic phase, water/oil microemulsion, two‐phase liquid‐liquid), the operation conditions (temperature, reagent feed flow rate, stirring rate, pH, reaction time), and the process strategy applied (batch, semi‐batch, continuous), it is possible to produce silver nanoparticles with different morphological properties. Silver nitrate is the most common metal precursor used, but silver acetate, silver citrate, and silver perchlorate anhydrou...…”

Section: Introductionmentioning

confidence: 99%

Influence of process parameters and scalability of the semi‐batch production of functionalized silver nanoparticles

et al. 2016

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The present work investigated in detail the effects of stirring rate, temperature, and the feed flow rate of the reducing agent on the properties of functionalized silver nanoparticles produced in a semi‐batch reactor. In addition, a specific formulation was tested in chemical reactors with different volumes to demonstrate the scalability of the process. The colloids were characterized using UV‐Vis spectrophotometry, transmission electron microscopy, X‐ray diffraction, and zeta potential. The scale up of the process was successfully performed, producing similar results at larger scales to those obtained in the small scale. Standardized antibacterial assays showed that fabric and polymer samples functionalized with the produced silver colloids presented outstanding antibacterial activity. These findings demonstrated that silver nanoparticles with specific properties and promising antibacterial applications can be rapidly produced through suitable tuning of the process parameters regardless the scale of production.

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Optical Response of Silver Nanoparticles Stabilized by Amines to LSPR based Sensors

Cited by 21 publications

References 6 publications

Growth of Gold Nanoparticles in a Glass Matrix by Continuous Laser Irradiation for Efficient Surface Enhanced Raman Scattering

Growth of Gold Nanoparticles in a Glass Matrix by Continuous Laser Irradiation for Efficient Surface Enhanced Raman Scattering

Influence of Magnetic Field on Silver Nanoparticles Synthesized by Laser Ablation

Influence of process parameters and scalability of the semi‐batch production of functionalized silver nanoparticles

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